One element of the memo I was happy to see, was the dogfooding of Yahoo! Mail/Calendar, as in, people at Yahoo! will start using it rather than Microsoft Exchange. Sometimes I think powerful personalities at Yahoo! IT, with a bit too much money and people working for them, have caused a not insignificant amount of the downfall at Yahoo! by treating the company like it was a financial firm, or the Department of Defens…
I've seen much the same thing happen at a company I worked at in the early late 1990's and early 2000's. The CIO had a heroic moment years ago and used the political capital to run IT as he saw fit, catering to the email/web needs on the sales/business side, but demonizing engineers who had more stringent needs. (Even to the point of a crony calling the complaining engineers "terrorists" in a public speech shortly after 9-11.)